package lishizheng.demo06;

//死锁：多个线程互相持有对方所需的资源，然后形成僵持。
public class DeadLock {
    public static void main(String[] args) {
        Makeup girl1 = new Makeup(0,"灰姑娘");
        Makeup girl2 = new Makeup(1,"白雪公主");

        //启动线程
        girl1.start();
        girl2.start();
    }
}

//口红
class  Lipstick{
}

//镜子
class  Mirror{
}

class Makeup extends Thread{

    //需要的资源只有一份，用static来保证只有一份
    static Lipstick lipstick = new Lipstick();
    static Mirror mirror = new Mirror();

    int choice; // 选择
    String  girlName; //使用化妆品的人

    Makeup(int myChoice, String myGirlName){
        choice = myChoice;
        girlName = myGirlName;
    }

    @Override
    public void run() {
        //化妆
        try {
            makeup();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }
    //化妆，互相持有对方的锁，即需要拿到对方的资源
    private void makeup() throws InterruptedException {
        if(choice == 0){
            synchronized (lipstick){//获得口红的锁
                System.out.println(girlName + "获得口红的锁");
                Thread.sleep(1000);
                synchronized (mirror){
                    System.out.println(girlName + "获得镜子的锁");
                }
            }

        }
        else{
            synchronized (mirror){
                System.out.println(girlName + "获得镜子的锁");
                Thread.sleep(2000);
                synchronized (lipstick){
                    System.out.println(girlName + "获得口红的锁");
                }
            }
        }
    }
}